Attosecond quantum optical interferometry

TL;DR

This paper introduces attosecond quantum interferometry (AQI), a novel technique that enables quantum optical measurements and control on the attosecond timescale, bridging attosecond physics and quantum optics.

Contribution

The work develops a new AQI scheme for manipulating and measuring quantum optical properties of harmonics, including phase-space, photon statistics, and entanglement, using attosecond quantum tomography.

Findings

Demonstrated control of harmonic photon statistics using two-color phase manipulation

Proposed a protocol for in situ quantum optical measurements at attosecond resolution

Connected attosecond measurement techniques with quantum optics frameworks

Abstract

In this work, we explore the scheme of attosecond quantum interferometry (AQI), the quantum optical version of classical attosecond interferometry, which allows to measure quantum optical properties on the attosecond time-scale. We develop how the scheme of AQI can be used for engineering the phase-space and photon statistics properties of the emitted harmonics, using the relative phase of a two-color driving field as a control, and further enables to manipulate the field correlations as well as their entanglement characteristics. In addition, this scheme allows us to learn properties of the phase-space distribution of the harmonic quantum state, by means of measuring an attosecond quantum tomography trace. This serves as a new type of protocol for in situ attosecond measurements of quantum optical observables. With this, we achieve to further connect all-optical attosecond measurement schemes with quantum optics, allowing for a rich manifold of observations.